For this release we re-fit our models on historical data provided fromadditional publisher partners. Additionally we have changed our methodology to include a longer time window. This enables us to better capture historical trends in our model.

Together, these factors generally caused our estimates for the total marketsize of each country as well as top performing apps to change. In most countries, the estimated market size increased; certain Asian markets were typically the exception. The table below summarizes these changes for the top 10 markets on iOS (iPhone only).

As a result of the enriched data set, accuracy in terms of MAPE (median absolute percentage error) between Q1 and Q3 2017 improved in almost all countries. The table below summarizes the countries that saw the largest improvement in MAPE.

% Improvement in Median Absolute Percentage Error

(top 5 markets for iOS, Q1-Q3 2017):

Overall,better models means better accuracy. It's important to note that the changes in our estimates might affect some apps, publishers, and categories more dramatically than others. If you have questions about how a specific subset of our platform has been impacted, please contact us (info@prioridata.com).